Yeah, I'm definitely aware of the many spelling of Leipzig. I've got newspaper clippings, census data, passenger manifests, naturalization forms, etc. that give at least five different forms of his name.
I've seen Leipziger, Leipsiger, Leipzig, Leipsig, and Leipsic. And I'm sure there's more that I'm not remembering right now.
And not only that, but several members of his family went by different FIRST names at various points. His brother Fred, for example, was called Issac (his middle name) when they lived in Sweden, and that is how he's listed on the passenger manifest when they came to the US. Afterwards, however, everything shows him as "Fred" or "Frederick".
Most places correctly get the first part right, though ("Leip"), so most of my searches are focusing on 'Leip*'.
Oh yeah...one more fun name thing. He used at least two different stage names during a tour of Canada while WWI was going on. Seems the folks booking him weren't too thrilled about having someone with such a German-sounding name, despite the fact that he had travelled Europe without a problem.